Subject is able to verbally confirm understandings of risks, benefits and treatment alternatives of receiving 6-month or 12-month or longer duration of DAPT and he/she or his/her legally authorized representative provides written informed consent prior to any study related procedure.

Exclusion Criteria:

An elective surgical procedure is planned that would necessitate interruption of thienopyridines during the first 12 months post enrollment.

Patients with cardiogenic shock

Subjects who have dialysis.

Women who are pregnant or breast feeing

Less than 2years life expectancy by previous medical history

Patients with hypersensitivity or contraindications for aspirin or clopidogrel

Patients who need long-tem clopidogrel taking due to cerebral infarction or other diseases